Question
Answer
$$-3\sqrt{3}(\sqrt{6}+\sqrt{3})=-9\sqrt{2}-9$$
Explanation
| $$ \begin{aligned}-3\sqrt{3}(\sqrt{6}+\sqrt{3})& \xlongequal{ }-(9\sqrt{2}+9) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-9\sqrt{2}-9\end{aligned} $$ | |
| ① | Remove the parenthesis by changing the sign of each term within them. |
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